Missing Value Codes vs Range Check
For process capability reports for vision systems, there are four kinds of data: 1. good measurements (even if a part is OOS, it is an accurate measurement), 2. bad measurements (camera finds the wrong reference fiducial -- these are typically >> 6 sigma OOS), 3. vision errors (system reports a numeric error code, like -9999), and 4. missing data (part did not get measured or data was not sent). ...
